You may encounter the dreaded Internal Server Error (500) as a WordPress user at some point. Unfortunately, this error message is a catch-all for a range of problems on your site, so you may need help to determine the root cause. Here are some of the most common reasons that cause Internal Server Errors (500):
Plugins conflict or a Buggy Plugin
A plugin conflict or a buggy plugin can cause the ISE 500 error. You can fix this error quickly by following the steps in this guide: Fixing the Plugins Conflict or Buggy Plugins
Low PHP Memory Limit
A low setting for the PHP memory limit may result in 500 errors. You can fix the error by following this guide: How to Increase PHP Memory Limit for Your PHP Site or CMS Like WordPress
Corrupt .htaccess File
WordPress uses the .htaccess file to manage permalinks and redirects. A corrupted .htaccess file can cause an Internal Server Error (500). Please use this guide to fix a corrupt .htaccess file: Fixing Corrupt .htaccess File in WordPress
Supposing none of the above steps resolve the Internal Server Error (500). In that case, it’s time to contact our support team.